jQuery UI dialog box not positioned center screen

Question

I have a jQuery dialog box that is meant to position in the middle of the screen. However, it seems slightly off-center vertically.

Here is the code:

$('#add_box').dialog({
    autoOpen: true,
    width: 300,
    modal: true,
    resizable: false,
    bgiframe:true
});

Any ideas why this won't center?

Answer 1

If your viewport gets scrolled after the dialog displays, it will no longer be centered. It's possible to unintentionally cause the viewport to scroll by adding/removing content from the page. You can recenter the dialog window during scroll/resize events by calling:

$('my-selector').dialog('option', 'position', 'center');

Answer 2

Are you adding jquery.ui.position.js to your page? I had the same problem, checked the source code here and realized I didn't add that js to my page, after that.. dialog magically centered.

Answer 3

Digging up an old grave here but for new Google searchers.

You can maintain the position of the model window when the users scrolls by adding this event to your dialog. This will change it from absolutely positioned to fixed. No need to monitor scrolling events.

open: function(event, ui) {
    $(this).parent().css('position', 'fixed');
}

Answer 4

I was having the same problem. It ended up being the jquery.dimensions.js plugin. If I removed it, everything worked fine. I included it because of another plugin that required it, however I found out from the link here that dimensions was included in the jQuery core quite a while ago (http://api.jquery.com/category/dimensions). You should be ok simply getting rid of the dimensions plugin.

Answer 5

1.) The jQuery dialog centers in whatever element you put it in.

Without more information, my guess is that you have a body div with a margin or something of the like. Move the popup div to the body level, and you'll be good to go.

2.) If you dynamically add content to the div as you load it, centering will NOT be correct. Do NOT display the div until you have the data your'e putting in it.